<?php

require_once 'HTMLPurifier/Strategy.php';
require_once 'HTMLPurifier/Config.php';

/**
 * Composite strategy that runs multiple strategies on tokens.
 */
class HTMLPurifier_Strategy_Composite extends HTMLPurifier_Strategy
{
	
	/**
	 * List of strategies to run tokens through.
	 */
	var $strategies = array();
	
	function HTMLPurifier_Strategy_Composite() {
		trigger_error('Attempt to instantiate abstract object', E_USER_ERROR);
	}
	
	function execute($tokens, $config, &$context) {
		foreach ($this->strategies as $strategy) {
			$tokens = $strategy->execute($tokens, $config, $context);
		}
		return $tokens;
	}
	
}

